keilholtz



I... S. KEILHOLTZ May 22, 19,23.

POWER PLANT Filed Mamh 28, 1918 2 SheetsSheet 1 May 22, 1923.

L. s. KEILHOLTZ POWER PLANT Filed March 28, 1918 2 Sheets-Shaet 2 E Elv Patented May 22, 1923. 5

UNITED STATES PATENT OFFICE.

LESTER S. KEILHOLTZ, OF DAYTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO DELCO-LIGHT COMPANY, OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

POWER PLANT.

Application filed March 28, 1918.

To all whom it may concern.

lie it known that l, L'ns'rnn El. KnrLnoL'rz, a citizen of the United States of America, residing at Dayton, county of Montgon'iery, and State of Ohio, have invented certain new and useful Improvements in Power *lants, of which the following is a full, clear, and exact description.

This invention. relates to engines of the internal combustion or explosion type, and has tor an object the provision of improved fuel supply devices. More particularly, an object oi the invention is to provide a unitary device in which the tuehpunip chamher, fuel filter chamber, tuel reservoir, air passage to the engine intake, and other associated parts are formed in a casting in order to render the device more compact and to reduce the number oi joints in the fuel-supply circuit to a minimum.

Another object of this invention is the provision of a casting which is a coupling between the breather tube and the engine i11- tahe, which is adapted to be connected with a remote source of fuel supply and which contains the fuel-pump and associated means for delivering the fuel "from the source of fuel supply to the engine intake.

Still another object 01 this invention is the operation oi the fuel-pump from the rocker arm of the valve gear by means oi? pivotally connected u'iembers including a lover which may be manually moved from its fulcrum whereby the pump may be inanually operated while permitting the coni'1cci';ion between the pump and engine to remain intact.

.l urthcr objects and advantages of the present invention will be apparent from the following description oi"? a preferred em bodiment thereof, reference being had to the accompanying drawings.

In the drawings: 7

Fig. 1 is a view taken at the flywheel end. of an. engine embodying the present invention certain parts being shown in. elevation and certain parts being in section for sake of clearness;

i 2 is a plan view of the fuel reservoir and carbureting chamber with the cover re moved to show part of the interior arrangement;

F 3 is a sectional view taken on line 5 5 of Fig. 2;

Serial No. 225,312,

Fig. 4 is a sectional view taken on line 6-6 of Fig. 2.

Referring to the drawings, 20 designates a base supporting a crank case casting 21. Casting 21 comprises the crank case 21 which includes a lubricant reservoir located at the bottom of the casting, and a chamber extending upwardly from the reservoir which provides a housing for the crank, connecting rod and other moving parts. The crank casting 21 also includes a jacket 21 surrounding theupper portion of the crank case, said jacket terminating with a circular flange 21 substantially on the level with the upper end of the crank case 21, and cooperating With crank case 21 to form an annular passage surrounding said crank case for a purpose to be described.

Crank case casting 21 supports crank shaft 24 which carries flywheel 25 provided with fan blades 26, and shaft 24 is provided with crank 27 formed integral therewith' Crank case 21 supports cylinder 40, in which is mounted for reciprocation a piston 4:1, connected by means of connecting rod 42 to crank 2. Cylinder 40 is provided with radiating fins 4L3.

Cylinder head l i is supported on the upper end of cylinder 40 and is provided with combustion chamber 44, an inlet passage 45, and an exhaust passage 46, to which an exhaust pipe 47 may be secured, (ylinder head 44 is provided with radiating fins 48 and 49.

Cylinder head 44: is provided with an intake valve 57 and an exhaust valve 58 which are guided in sleeves 44 and normally held in seated position upon valve seats 44 by means of springs 59 and 60, respectively. lhe inlet and exhaust valves are unseated by suitably supported rocker arms and 56. respectivelypwhich may be actuated from the cam shaft by any desired means, as for example, push rods 61. and 62 Which are lifted by cams 63 and 64;, respectively, carried on the cam shaft 65. Cam shaft 65 is supported for rotation by lbearing 66 mounted in the crank case casting 21, and carries a gear 68 cooperating with gear 69 mounted on. shaft 24.

The valve gear, including the rocker arms and push rods, are preferably mounted on the engine in a manner such that the clearance between the end of the valve and the Kettering. No. 1. ililthOiYii, dated June 7, 1

, 11mm: e ldQ Fuel chamber .3

rocker arm will remain the same for all temperatures to which the engine is subjected in operation, whereby correct valve timing is maintained for alltemperatures and unnecessary valve noise is elin'iii'iated. The manner by which this result is accomplished is described and claimed in my divisional application, Serial Number 805,310, filed June 19, 1919, to which reference is made for further details thereof.

Gear 71 mounted upon casting 21 coop crates with gear carried by the crank shaft 2 1 for the purpose of: throi'ving oil. which is contained in. the lower part of the crank case 21, to the various moving parts contained within the crank case. Oil may be introduced through pipe 72 and drained oil through pipe 73. Indicator 74; cooperating with float 75 shows the level of the oil in the crank ease. Y

Crank case casting 21 supports jacket which, S1111'O1l1id5-3 the sides of the cylinder and cylinder head; and jacket '76 supports jacket 17 which is opened at its upper end and surrounds the upper portion oi? the cylinder head and parts supported thereon. As the flywheel rotates the $21.11 blades 26 carriedthereby will cause the circulation of air down through jacket 7'7, T6 and through the space between the jacket 21 and crank case 21 and out of the engine between the fan blades. I

Crank ,caseca-stinp; is provided with t passage 80. which leads into breather or breather tube '31 comprising a base upon which is supported an outer casing: 83. pro- .vided with holes Setlocated near the lower end thereot. Base isprovided with a-valve normally held down by gravity or by means of springhtl upon Waive seat 8?. The function oi? the valve 85 to normally close the passage roni the crank case to the breather. i'tn inner tube 88 is mounted on base 82 concentrically with relation to casii'rg Tube 88 open at both'ends ""ll is provided with a side openinq 89 near the rzture 00 whi. ii. issi pported by means of? cylinder head fl-1t" ser'i' es as a car} i'or'upp of the breather and closes the upper 'f the space :etween the outer c: l 8?,- and the i snip; inner tube 88, and serves to term a coi' tijiuiation of t re pass tron-1 inner tube 1.8 to the inlet pipe 4-5inthe cylinder head. The construction of the b eather is substantially the sane as that described iii the pateni/to Charles F.

w and since s d h 'cathei forms .no part of the present invention, further d ription is coit-' sidered itinneciessary. The operation of the breather may bebriefly stated as consisting" first, of driving out on the explosion stroke an'd upwardly thrr gh valve '85 into inner tube 88, out through opening; 89., as i by arrow 89*, the"vaporos crank case including; unliiurnt fuel which has leaked passed the piston rings. ...leitorc the aforesaid vapors can pass down vardly and reach the botton ot outer casi take stroke oi? the piston will have taken place. .At this time the contents oi casing 83 will be sucked upwardly tlll'OlWll opening 89, as indicated by arrow 80 or. ill pass through passages 96, 97 and 05% in fuel. chamber fixture 90 to be described and into intake passap e as. ln this n the escape oi sii'ioke and obnoxious iiuuies from the crank case and breather tube into the room is prevented. I

The fuel chamber fixture or casting; 90 will now he described. Casting 00 comprises a flange 90 by means oil? which id (.zasting is secured to cylinder head 44. The lower portion of casting 90 is provided with an outwardly extending portion 91 which is provided with a circular recess 92 for the reception of the upper end of the inner tube 88 ot' breather 81, which, when assembled, abuts against the shoulder 03 'lorined in said casting 90. The portion 91 is pro vided with an annular recess 94!; containing a felt packing ring); 95, for the reception of tl e upper end of the outer casing The passage 96 forms a continuation of the recess 92 and serves to connect the breather with the engine intake, and includes a carl'mretinn' or mixing; chamber con' prisino' venturi pa sages 97 and 98. 11 plate throttlewaflve located in recess 90 is mounted for rotation upon a stub shaft 100 which carries a throttle lever 101, which may be moved manually orby any suitable devi z,-

Casting 90 is provided with a cylinder 102 in which reciprocates a piston 103 having passage ways 1.041 and 105 bored therein. The lower end of piston 103 has passage 104: provideijl with a check valve 10?. lpon the reciprocation of the piston 103 Fuel will be drawn up froi'n a source of supply not shown through pipe 10? around an annular recess 109 in filter plug; 108. through hole 110 leading to the interior of said plug 108, and through screen 111 car ried thereby into filter chamber 112. From chamber 112, fuel will pass during the up ward. stroke of the piston around check valve 113, and into cylinder 102. Upon the downward movement of the piston, :tuel will. pass upwardly into passage 104;, and, when this passage has been filled, will flow outwardly through passage 105 into chair: her 125 and into "fuel reservoir 126.

The upper end of piston v103 is bifurcated at 11 1 to receive lever 116 connected by means of pin 115 to piston .103. The lever 116' fulcrumed within. the notch 118 provided in fulcrum post 117 and is connected by means of link 119 and stud 120 with rocker arm The spring 121, connected at one end with lever 116 and, at

the other, with a lug 122 projecting from casting 90 serves normally to retain the pis ton in its downward position, and to hold lever 11.6 upon its fulcrum. it will be seen that there has been provided a simple and convenient device for operating the pump piston from a moving part of the engine. Attention is called to the fact that the pump may be operated manually when the engine is at rest, without making any disconnections. The pump piston 103 may be re ciprocated manually by rocking lever 116 about its connection with link 119 a fulcrum, since the connection between the le 'er and fulcrum is not permanent, the spring; 121 serving to yieldingly hold the lever in position. The bifurcation in post 11? serves as a guide for lever 116 during manual operation.

When a certain level in the fuel reservoir 126 has been obtained, the surplus fuel may flow over waste w'ir 126 to overflow chamber 127 and passage 128 to the source of supply. The pump is so constructed that there will always be a surplus of fuel passing over the waste weir beyond that which is required for the operation of the engine, so that a fuel level will. be maintained practically constant. From reservoir 126 the fuel-charge will pass through opening 129 into the fuel. chamber 130, the bottom of which is slightly below the level of the fuel in the reservoir. By reason of the constant level maintained in said reservoir, a constant quantity of fuel necessary for each charge will be maintained in said fuel-i charge chamber 130. Upon the suction stroke of the engine, this fuel charge will be suclred out of chamber 130, through passage 131, and into venturi passages 97 and 98, where it will mix with the contents of the breather tube which has been drawn in, as described.

The casting 90 is provided with a recess 132 for the reception of fuel for priming which may pass downwardlyl thrmigih a passage 133 containing a wick, and into passage 7.

The fuel reservoir is provided with a cover 136 held in position upon the top of the castingby means of a spring 1.35 which is retained between the shoulder, formed on fulcrumed post 117, and the cover 136.

The passage 96 is provided with a butterfly valve 13'? mounted upon. shaft 138 whichv carries a lever 139, by means of which the position of said valve may be changed to vary the proportion of the fuel mixture.

It will be apparent from the foregoing description that the fuel chamber casting 90 provides an enclosure for the upper end of the breather, and forms the stationary elements of the pump, a fuel reservoir and overflow chamber. a chamber for accumir lation of the fuel charge, and a fuel mixinp; chamber; and provides a support for the throttle and mixture controlling; valves and the pump lever. By locating the fuel pump within the fuel chamber casting, the number of connections between the source of fuel supijily and the fuel chamber is reduced to a minin'ium, resulting in the prevention of loss of fuel and the removal. of danger from lire, ordinarily due to leaky connections. By combining a number of elements in one unitary structure, and thereby reducing the number of parts in the manner described, a maximum of economy and simplicity of construction has been obtained.

As a means of control for the throttle valve, there is provided a solenoid magnet 1 .0, which cooperates; withv a solenoid armature 141, which is connected with throttle lever 101 The position of the throttle lever may thus be controlled electrically according; to the amount of electrical energy delivered to the solenoid magnet. This controlling device, however, forms no part of. the present invention but is described and claimed in the copending application. of Charles F. Kettering, Serial No. 226,986, filed April 6. 1918. i

While the form of mechanism herein shown and described. constitutes a preferred.

embodiment of one form of the invention, it is to be understood. that other forms minht be adopted. and various changes and altbn ations made in the shape, size, and proportion of the elements therein without departing; from the spirit and scope of the invention.

What I claim is follows:

1. In a device of the kind described. the combination with an lniJQli11 tl-CO111b11 stion engine have an intake; of a pump communicat-inn" with the intake, and havin cooneral: mg; stationary and movable elements: a fulcrum; a lever connected to the movable element and seated upon the fulcrum; vieliiliue' means normally holdingr the lever on the ful crum: and means connei'rtinn' the lever with a moving part of the engine.

2. In a device of the hind. described, the combination with an interniii-combustion engine having; an intake; of a pump communicating with the intake, and comprising 00-- operating station y and movable elements; a fulcrum; a lever attached. at one end of the movable element and normally seated upon the fulcrum; a spring; normally holdingr the lever on the fulcrum; and a link adapted to connect the lever with a moving part of the engine.

3. lo. a device of the kind described. the combination with an engine having an intake, of a fuel pump communicatin52, with the intake, and including cooperatin stationary and movable elements; and means positively connecting the movable element with a movinn part of the ca ine, said connecting means comprising .a pivoted element adapted to be moved from its normal fulcrum for manually operating the pump.

4:, In a device of the kind dc"- ibed, the combination with an engine having an intake, of a fuel pump communicating with the intake, and including cooperating stationary and movable elements; and means positively connecting the movable element with a moving part of the engine, said connecting means comprising a rocking member adapted to be moved from its normalv ful crum for manually operating the pump.

In a device of the kind. described, the combination with an engine having an in take, of a fuel pump communicating with the intake, and including cooperating tionary and movable elements; mechanism providing a positive inez-ltensible incontractile connection between the movable ele ment and a moving part of the engine, said mechanism being adapted for manual n1ovement independently of the engine movement while maintaining intact its connection with said movable element and said moving en.- gine part.

6. In a device of the kind described, the combination with an engine having an in" take, of a fuel pump communicatingwith the intake, and including cooperatin stationary and movable elements; a linkage positively and pivotally connected to the movable element and to a" moving part of the engine, said linkage including a lever normally fulcrumed on a fixed part of the engine; and

means for actuating said linkage independently of the engine movement to operate the fuel pump while maintaining. intact .its connection with said movable element and. said moving engine part.

7. In a device of the kind described, the combination with an engine having an intake, of a fuel. pump communicating with the intake, and including cooperating stationary and movable elements; a linkage positively and pivotally connected. to the movable element and to a moving part of the engine, said linkage including a lever normally fulcrumed on a fixed part of the engine and a link connecting said lever direetly to, the rocker arm of the engine valve gear; and means for actuating said linkage independently of the engine movement to operate the fuel. pump while maintaining intact its connection with said movable element and said. moving engine part.

8. In a device of the kind described, the combination with an internal-combustion engine havinga breather connected with the crank case and including outer and inner walls; of a fuel chamber casting adapted to be connected With the engine intake and to form a closure for the space included between the walls of the breather into the engine intake, said casting including a mixmeat/9o ing chamber, and provisions in the casting for delivering a constant quantity of fuel to the mixing chamber at each suction stroke of the engine.

9. In a device'of the kind described, the combination with an internal-combustion engine having a crank case, an intake, and a breather extending vertically from the crank case; of a fuel chamber casting adapted to be connected with the intake and breather and to form a closure for the upper end thereof, said casting including a passage from the breather to the intake which includes a miX' 1g chamber and provisions in the casting for delivering a constant quantity of fuel to the mixing chamber at each suction stroke of the engine.

10. In a device of the character described, the combination with an internal-combustion engine having an intake, a crank case and a breather pipe connected to and extending vertically from the crank case; of a fuel-chamber casting connected with the engine intake and the breather pipe and forming a closure for the adjacent end thereof, said casting comprising an air passage from the breather pipe to the intake including a mixing chamber, a fuel reservoir communicating with the passage, and a fuel pump adapted to pump fuel from a remote source of fuel supply into the fuel reservoir.

11. In a device of the character described, the combination with an internal-combustion engine having an intake and a breather tube; of a fuel-chamber casting connected with the engine intake and the breather pipe and forming closure for the adjacent end thereof, said casting comprising an air passage from the breather pipe to the intake including a mixing chamber, a fuel reservoir communicating with the passage, and means adapted to pump fuel from a remote source of fuel supply into the fuel reservoir.

12. In a device of the character described, the combination with an internal-combustion engine having an intake and a breather tube; of a fuel-chamber casting connected with the engine intake and the breather pipe and forming a closure for the adjacent end thereof, said casting comprising an air passage from the breather pipe to the intake including a mixing chamber, a fuel-charge chamber communicating with the mixing chamber, a fuel reservoir connected with the fuel-charge chamber, and engine-actuated means for replenishing said fuel reservoir.

13. In a device of the kind described, the combination with an internal-combustion engine having an intake; of a unitary fuel'chamber member adapted to be attached to the engine intake, and formed to provide a fuel filter chamber, a fuel-pump cylinder, a reservoir connected with the pump cylinder, a fuel-charge receiving chamber communicating Withthe reservoir, a Waste Weir for the reservoir, and air passage leading from the interior of the fuelchamber member to the engine intake and including a venturi passage forming a mixing chamber, and a passage from the fuel-charge chamber to the mixing chamber; a throttle valve mounted for movement upon the fuel-chamber member and adapted to close the air passage between the mixing chamber and the engine intake; a piston adapted to reciprocate in the pump cylinder; and means for operating the piston.

14. In a device of the kind described, the combination With an internal-combustion engine having an intake and breather; of a unitary fuel-chamber member, adapted to be attached to the intake and to form the upper-end part of the breather, and also formed to provide a fuel-filter chamber, a fuel-pump cyiinder, a reservoir connected With the pump cylinder, a fuel-charge receiving chamber connected With the reservoir, a Waste Weir for the reservoir a passage from the breather to the intake, including a venturi passage forming a mixing chamber, and a passage leading from the fuel-charge chamber to the mixing chamber; 21 throttle valve in the air passage, 9. piston adapted to reciprocate in the cylinder; and means tor operating the piston.

In testimony whereof I allix my signature.

LESTER S. KEILHOLTZ. Witnesses:

J. W. MCDONALD, IRVIN A. GREENWALD. 

